[wg11] EXPRESS and P28 String Data Type issue

[David Price]

Just to clarify, this is really a comment against the Part 28 Edition 2
default mapping as the MAP configuration directive allows EXPRESS string to
be mapped to XML Schema string in the CD document.

Was this raised as an issue or discussed in the P28 E2 workshop, and if so,
what's the default mapping going to require?

Cheers,
David

> -----Original Message-----
> From: wg11-bounces at steptools.com [mailto:wg11-bounces at steptools.com] On
> Behalf Of Phil Spiby
> Sent: 07 September 2004 16:50
> To: wg11 at steptools.com
> Subject: [wg11] EXPRESS and P28 String Data Type issue
> 
> It has come to Eurostep's attention (whilst testing some of our P28
> production capabilities) that there is an issue with the domain of the
> string data type and the mapping of this data to P28 files.
> 
> The definition of the string data type is:
> The string data type has as its domain sequences of characters. The
> characters that are permitted as part of a string value are those
> characters
> allocated to cells 08 to 0D and the graphic characters lying in the ranges
> 20 to 7E and A0 to 10FFFE of ISO/IEC 10646-1.
> 
> This definition was adopted in TC1 when the EXPRESS language was
> harmonized
> with SGML and XML such that data in a CDATA section of SGML/XML was not
> corrupted when passed into an EXPRESS based data structure. It now seems
> that the P28 approach of mapping the EXPRESS string data type to a
> normalised string removes this capability, since all formatting characters
> (cells 08-0D) handled by a CDATA section and the EXPRESS data type are now
> lost.
> 
> Basically the P28 mapping of data from EXPRESS is removing data from the
> exchange file (since it is converting any formatting characters into
> spaces).
> 
> Phil
> 
> --------------------------------------------
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